Deer Lodge is located on the Clark Fork River, in between Missoula and Butte. Deer Lodge, like other western Montana towns, is surrounded by mountains. Getting to Deer Lodge is easy, as it sits right on Interstate 90. Deer Lodge is home to the Old Montana State Prison, which has been turned into a museum and is probably the town’s biggest tourist attraction. The downtown area in Deer Lodge has been nicely restored and is a nice place to just wander around. And, for the person who has some time on their hands, a trip through the Old Montana State Prison is also a highly recommended activity.